Double Helix of Icosahedra Structure and Spin Glass Magnetism of the δ-Co_2.5Zn_{17.5-<i>x</i>}Mn_<i>x</i> (<i>x</i> = 0.4-3.5) Pseudo-Binary Alloys.

ABSTRACT: We have synthesized δ-Co_2.5Zn_17.5-xMn_x (x = 0.4-3.5) pseudo-binary alloys of 10 different compositions by a high-temperature solid-state synthetic route, determined their crystal structures and the Mn substitution pattern, and estimated the existence range of the δ-phase. The alloys crystallize in two chiral enantiomorphic space groups P6₂ and P6₄, where the basic atomic polyhedron of the chiral structure is an icosahedron and the neighboring icosahedra share vertices to form an infinitely long double helix along the hexagonal axis (like in the δ-Co_2.5Zn_17.5 parent binary phase). The alloys are pure δ-phase up to the Mn content x ≈ 3.5. The Mn atoms partially substitute Zn

SUBMITTER: Mondal A 

PROVIDER: S-EPMC11151197 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature